Truck for supporting form rollers on printing presses



June 23, 1925.

U K EQB. ufim inne mm ROLLERS 0N mum-me PR ssEs Filed m; 9, 192's Fig-1- Patented June 23, 1925.

UNITED STATES FERDINAND H. ZIMMERER, OF ST. LOUIS, MISSOURI.

TRUCK FOR SUPPORTING FORM ROLLERS 0N PRINTING PRESSES.

Application filed February 9, 1925. Serial No. 7,755.

To all whom it may concern:

Be it known that I, FERDINAND H. Znr MERER, a citizen of the United States, and a resident of the city of St. Louis, State of Missouri, have invented 'a new and useful Truck for Supporting Form Rollers on Printing Presses, of which the following is a specification.

This invention relates to trucks for supporting form rollers on printing presses.

There are existing difficulties encountered in the use of the usual metallic trucks for supporting the form rollers of printing presses. Such difficulties consist in the fact that the tracks or ways upon which the trucks operate become worn or parts thereof break 0H as a result of the continuous operation of the trucks thereon. As a corn sequence the form rollers are supported too low and bear too heavily upon the forms. Another difliculty has resulted from the fact that the pressure against the outer ends of the trucks causes the inner ends thereof to become worn, and it has occurred that the trucks have moved inwardly so far that they have dropped off of the tracks. This has permitted the form rollers to be pressed too heavily upon the forms, causing considerable damage to the machine.

My invention is designed and adapted to overcome these difficulties and to prevent their occurrence. In actual practice the inventionhas been used with highly beneficial results and the difliculties mentioned have been entirely eliminated.

Therefore, the object of the invention is to produce a truck embodying the structure and possessing the characteristics here in disclosed and which avoids, eliminates and prevents occurrence of the difficulties mentioned.-

Other objects will appear from the following description, reference being made to the drawing in which Fig. 1 is a sectional view of my improved truck in connection with the form roller shaft of a printing press.

Fig. 2 is a cross sectional view on the line 22 of Fig. 1.

Fig. 3 is a vertical sectional view on the line 3-3 of Fig. 1.

Fig. 1 is a perspective view of my improved truck detached from the shaft.

Fig. 5 is a sectional view of an alternative form of the invention.

As shown in Figs. 1 to 4 inclusive my improved truck comprises a roller 1 composed preferably of indurated fiber, or some similar substance possessing the character istic that it will operate upon the metallictrack 2 more silently and resiliently than will a metallic roller. As a result of this characteristic I have found that the track 2 does not wear away nor become broken which, however, has been my experience in the use of the usual metallic rollers.

The shaft 3 of the form roller has a key pin 4 extending diametrically therethrough and projecting radially beyond opposite sides thereof. The truck roller 1 has a pair of longitudinal radial grooves 5 at diametrically opposite sides of the hole through which the shaft 3 extends, designed and adapted to receive the ends of the key pin 4:, as clearly shown in Fig. 3. The key pin 4. thus constitutes a connection by which the form roller is rotated with the truck.

The inner end of the truck roller 1 has an annular recess therein in which a hard metallic disc'6 is seated. The disc 6 has a central hole in continuation of the axial hole through the truck roller 1 through which the shaft 3 extends. Said disc also has a pair of radial notches 7 at diametrically opposite sides of said hole and in continuation of the grooves 5. When the truck roller is placed upon the shaft the ends of the key pin 4 pass through the notches 7 and into the grooves 5.

The shaft 3 has a pin 8 extending diametrically therethrough and projecting radially therefrom on diametrically opposite sides transversely of the plane of the key pin 4; and serving as an abutment for the metallic disc 6. Thus the disc 6 serves the function of limiting inward movement of the truck roller and of protect ng the truck roller from wearlng action by the abutment 3. Moreover, the disc 6 is removable and tions and to cause the form roller to operate properly upon the forms irrespective of atmospheric variations. As shown, the alternative form of the device comprises an integral body including a roller portion 9 of approximately the same diameter as the truck roller 1; and in addition a roller portion 10 integrally united therewith and of slightly smaller diameter. The two roller portions are defined from each other by a circumferential groove 11.

The end of each of the roller portions is provided with radial grooves 12 correspond ing to the radial grooves 5 and with a metallic disc 13 corresponding to the metallic disc 6. lhis structure permits the truck roller to be placed in reverse positions upon the shaft 3 to cause either of the portions 9 or 10 to operate upon the track.

In practice I have found that my invenlion obtains all of its useful and intended objects and purposes and prevents the occurrence of any serious difficulties and tro-ubles. I do not restrict myself unessentially, but what I claim and desire to secure by Letters Patent is 1. A truck roller for form rollers comprising a roller composed of indurated fiber hav ing a pair of diametrically opposite radial grooves extending inwardly from one end in combination with a metallic plate en1 bedded in said end of said roller and having\ a pair of diametrically opposite radial notches in continuation of said grooves.

2. A truck roller for form rollers compris- 35 ing a body composed of indurated' fiber, in combination with a metallic plate embedded in one end of said body and said body having key engaging grooves therein.

3. A device of the character described comprising a body composed of i-ndurated fiber and including two round integrally united portions of different diameters, and a metallic plate embedded in the outer end of each of said round portions. V

FERDINAND H. ZIMMERER. 

